CORMORANT

Unlike most birds, cormorant feathers get wet when they dive for fish, their only food, and so they must dry them out before they can fly efficiently. Thus, after fishing, cormorants must perch on a branch or log with their wings outstretched in the sunshine.

http://www.arizonensis.org/sonoran/fieldguide/vertibrata/phalacrocorax_brasilianus.html